Help - SRV lines sizes
Help - SRV lines sizes
(OP)
Hello,
I am currently in the process of sizing inlet and outlet relief valve lines. We are in detailed engineering phase but the isometrics are not yet available. However i am asked to issue asap the SRV data sheets with.
I would like to know if one could provide me typical equivalent length values for both inlet and outlet lines sizing? or other guidelines?
Thank you in advance
I am currently in the process of sizing inlet and outlet relief valve lines. We are in detailed engineering phase but the isometrics are not yet available. However i am asked to issue asap the SRV data sheets with.
I would like to know if one could provide me typical equivalent length values for both inlet and outlet lines sizing? or other guidelines?
Thank you in advance
"We don't believe things because they are true, things are true because we believe them."
"Small people talk about others, average people talk about things, smart people talk about ideas and legends never talk."





RE: Help - SRV lines sizes
Outlet length must be at least the vertical distance to the roof plus 7-8 ft.
There is no way to give mildly accurate L/Ds without some understanding of the physical plant arrangement.
I2I
RE: Help - SRV lines sizes
RE: Help - SRV lines sizes
I would need another piece of advice: some relief valves will dischage in flare header, at atmosphere and in a drain drum.
Could you please tell me the metodology, document to use, in order to perform flare header sizing namely? Is it related to outlet line sizing?
"We don't believe things because they are true, things are true because we believe them."
"Small people talk about others, average people talk about things, smart people talk about ideas and legends never talk."
RE: Help - SRV lines sizes
RE: Help - SRV lines sizes
When designing flare header, following may have to be addressed :
- velocity
- rho x velocity^2
- back pressure
- noise level
- acoustic Induced Vibration
- two phase flow
As for PSV inlet and outlet, other than sizing... other aspect are important as well. Simple compilation in "Concerns & Recommendations on PSV INLET line" and "Few Concerns & Recommendations of PSV Discharge Tail pipe"
JoeWong
Chemical & Process Technology